<style>
  .header-navbar {
    position: relative;
  }
  .logoutBtn {
    position: absolute;
    width: 80px;
    height: 24px;
    font-size: 17px;
    color: #fff;
    text-align: center;
    right: 100px;
    top: 50%;
    margin-top: -12px;
  }
  .logoutBtn:hover {
    cursor: pointer;
  }
</style>

<!-- navbar collapse -->
<div class="collapse pos-rlt navbar-collapse box-shadow header-navbar" style="background: #233645;margin-left:0px">
  <img src="img/logo.png" alt="." style="padding: 15px 0px 15px 150px;">
  <span class="logoutBtn" ui-sref="access.signout">退出登录</span>
</div>
<!-- / navbar collapse -->
